The Mystery Rider is a lost[1][2] 1928 American silent Western film serial directed by Robert J. Horner and starring William Desmond.
Horner produced and released through Universal Pictures.
AFI has the film listed as a five-reel feature (a possible whittled-down five-reel version of the serial).
[3] A trailer for the film (or its episodes) survives in the Library of Congress.
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